Worker polymorphism in the marauder ant Pheidologeton affinis. Pictured here is a single supermajor worker, two major workers, and lots of minor workers. These ants are all sisters and are essentially genetically identical, their different morphologies a result of developmental plasticity. The degree of polymorphism in Pheidologeton is one of the largest among ant species.
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This image was captured with a Canon EOS D60, with a Canon 65/2.8 MPE 1-5x Macro lens.